Honestly, if Alyaska/Alaska belonged to the US, well...gold and oil I guess. Nothing we didn't already have. Certainly nice, but not going to make a massive difference in the US. How many people could we get to relocate there at all? As opposed to the 6 million Russian emigres. Frankly, American Alaska would be less developed and almost a resource colony to the US. I can see native populations being ignored to have American crews come in for resource extraction, and not a lot else.